US4071345A - Apparatus for press bending window glass - Google Patents

Apparatus for press bending window glass Download PDF

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Publication number
US4071345A
US4071345A US05/739,038 US73903876A US4071345A US 4071345 A US4071345 A US 4071345A US 73903876 A US73903876 A US 73903876A US 4071345 A US4071345 A US 4071345A
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US
United States
Prior art keywords
glass
bending
convex
mold
sheet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US05/739,038
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English (en)
Inventor
Alfons Werner
Mario Roth
Hans-Peter Siemonsen
Johann Winandi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Gobain Industries SA
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Saint Gobain Industries SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saint Gobain Industries SA filed Critical Saint Gobain Industries SA
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Publication of US4071345A publication Critical patent/US4071345A/en
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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/02—Re-forming glass sheets
    • C03B23/023—Re-forming glass sheets by bending
    • C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
    • C03B23/031—Re-forming glass sheets by bending by press-bending between shaping moulds the glass sheets being in a vertical position

Definitions

  • the bending molds again consist of solid molds and the sheets of glass disposed between the bending tools are heated by means of gas burners (German A.S. 1,285,110, U.S. Pat. No. 3,333,935).
  • the gas burners not only heat the bending tools but also the sheets of glass.
  • this process does not avoid the disadvantages arising from the contact of a hot sheet of glass with the substantially cooler bending tools.
  • the burners are not disposed in such a way to uniformly heat the entire surface of the sheet of glass and the bending tools.
  • the bending apparatus is constructed with heating means which avoids the surface deformation problem of the prior art and in which heating of the bending surface coming into contact with the sheet of glass is achieved as rapidly and efficiently.
  • the concave bending mold consists of a frame which only comes into contact with the sheet of glass at its periphery. Heaters which rapidly and uniformly heat the surface of the convex bending mold disposed opposite them are mounted inside this frame.
  • the heaters include infrared tubes disposed inside and behind the bending frame of the concave mold and they very efficiently heat the entire outside surface of the convex bending mold, i.e., the surface part of the mold coming into contact with the glass.
  • FIG. 1 is a vertical section of the bending apparatus having the features of the invention
  • FIG. 2 shows the concave bending mold with the infrared tubes
  • FIG. 3 is an enlarged detailed view of FIG. 1 showing the structure of the concave bending mold.
  • the bending apparatus comprises two pneumatic or hydraulic jacks 1, 2 on the rods 3, 4 of which are mounted the bending molds 5, 6.
  • the convex bending mold consists of a support plate 7 on which are disposed tubes 8 and a metal plate 9 corresponding to the desired shape of the sheet of glass.
  • the metal plate 9 is attached to the tubes 8 along its periphery by means of threaded securing rods 10. The shape of the metal plate 9 can be adjusted by means of the threaded rods 10.
  • the convex surface of the metal plate 9 is covered with a fiberglass material 11.
  • a layer of thermal insulating material in the form of a fiberglass pad 12 is disposed at the rear of the metal plate 9.
  • the metal plate 9 consists of an aluminum sheet having a thickness of about 7 mm.
  • the concave bending mold consists essentially of a steel frame 14. As shown in FIG. 2, this frame has a shape corresponding to the periphery of the sheets of glass to be bent so that it will only come in contact with the glass at its periphery.
  • the frame 14 is covered with a fiberglass material 15 and is also adjustable by means of the threaded rods 16 which are attached at their other ends to tubes 18 in turn mounted on the support plate 17.
  • the frame structure 14 of the concave mold provides an open center portion free of any structure that will contact the sheets of glass.
  • this center space there is disposed a row of infrared emitters 20 emitting a medium ray length and heating the surface 11 of the bending mold disposed opposite them to a temperature of 450°-550° C.
  • the infrared emitters 20 are mounted in a sheet metal box 21 and consist of two twin tubes comprising a heating winding.
  • the infrared emitters 20 are disposed to conform to the shape of the convex bending mold so as to preserve a uniform short gap between the emitting surface of the infrared tubes and the convex bending surface 11.
  • the maximum emission of the infrared tubes is between 2 and 4 ⁇ m.
  • the rear face of the tubes is covered with a reflecting gold layer 22.
  • the sheet metal box 21 comprises a reflecting part 23 forming with the base wall 24 of the box a cooling flue whose action is reinforced by two openings 25 disposed at the lower and upper parts of the flue. The hot air escapes through the upper opening and is replaced by cool air entering through the lower opening.
  • a mounting plate 27 is attached to the tubes 18 and the boxes containing the infrared tubes are screwed to the mounting plate 27.
  • a layer of thermal insulating material 28 is disposed between the mounting plate 27 and the tubes 18.
  • the infrared tubes 18 effect heating of the bending surface of the convex mold prior to the placement of the sheet of glass between the molds.
  • heating the molding surface exclusively by means of infrared rays it is possible to obtain maximum uniformity of heating such that temperature gradients which could cause surface deformation of the bending molds are not produced.
  • the actual bending of the sheet of glass is effected by actuating the jacks 1, 2. This causes the molds to move toward each other. With this movement, the frame engages the periphery of the glass on one side while the convex surface 11 of the opposed mold contacts the opposite side of the glass to produce bending to the desired shape.
US05/739,038 1975-11-13 1976-11-05 Apparatus for press bending window glass Expired - Lifetime US4071345A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7534574A FR2331525A1 (fr) 1975-11-13 1975-11-13 Dispositif de bombage de vitrages a l'aide de presses
FR7534574 1975-11-13

Publications (1)

Publication Number Publication Date
US4071345A true US4071345A (en) 1978-01-31

Family

ID=9162335

Family Applications (1)

Application Number Title Priority Date Filing Date
US05/739,038 Expired - Lifetime US4071345A (en) 1975-11-13 1976-11-05 Apparatus for press bending window glass

Country Status (11)

Country Link
US (1) US4071345A (sv)
JP (1) JPS5261876A (sv)
BE (1) BE848278A (sv)
BR (1) BR7607586A (sv)
CA (1) CA1081957A (sv)
DE (1) DE2646845C3 (sv)
ES (1) ES453271A1 (sv)
FR (1) FR2331525A1 (sv)
GB (1) GB1523188A (sv)
IT (1) IT1075033B (sv)
SE (1) SE417599B (sv)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4274858A (en) * 1980-01-28 1981-06-23 Ppg Industries, Inc. Molds for press bending glass sheets
US5122177A (en) * 1990-01-11 1992-06-16 Nippon Sheet Glass Co., Ltd. Method of and system for pressing sheet glass
US5139552A (en) * 1989-12-05 1992-08-18 Nippon Sheet Glass Co., Ltd. Apparatus for bending and tempering sheet glass
US5346526A (en) * 1992-01-08 1994-09-13 Libbey-Owens-Ford Co. Apparatus for bending glass sheets
US5755845A (en) * 1994-04-15 1998-05-26 Pilkington Glass Limited Method and apparatus for bending and tempering glass sheets
WO2002068347A2 (en) * 2001-02-27 2002-09-06 Pilkington North America, Inc. Heated ceramic female mold
US20160279916A1 (en) * 2015-03-24 2016-09-29 Boe Technology Group Co., Ltd. Chip press device and chip press method
CN110252860A (zh) * 2019-07-17 2019-09-20 江苏润松新材料有限公司 一种铝基材复合板圆弧面复合机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2908998C2 (de) * 1979-03-08 1980-10-02 Bfg Glassgroup, Paris Verfahren zur Temperaturerhöhung der Formflächen einer Biegepresse zum Biegen von Glasscheiben und für die Durchführung des Verfahrens geeignete Biegepresse
DE102016114857A1 (de) * 2016-08-10 2018-02-15 Ebner Industrieofenbau Gmbh Temperierbare Umformvorrichtung für Metallbänder

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3110929A (en) * 1960-08-23 1963-11-19 Perret Jean Apparatus for manufacturing a watch glass
US3123459A (en) * 1952-04-05 1964-03-03 Carl hens
US3333935A (en) * 1964-02-03 1967-08-01 Pittsburgh Plate Glass Co Method of and apparatus for shaping glass sheets with opposed pressing members
US3573889A (en) * 1969-06-16 1971-04-06 Permaglass Method for shaping,tempering and laminating glass sheets
US3837833A (en) * 1971-11-02 1974-09-24 Ppg Industries Inc Heated cover protector for press bending block
US3871857A (en) * 1974-02-19 1975-03-18 Ppg Industries Inc Apparatus for press bending glass sheets
US3960535A (en) * 1974-09-13 1976-06-01 Libbey-Owens-Ford Company Method of and apparatus for bending glass sheets

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123459A (en) * 1952-04-05 1964-03-03 Carl hens
US3110929A (en) * 1960-08-23 1963-11-19 Perret Jean Apparatus for manufacturing a watch glass
US3333935A (en) * 1964-02-03 1967-08-01 Pittsburgh Plate Glass Co Method of and apparatus for shaping glass sheets with opposed pressing members
US3573889A (en) * 1969-06-16 1971-04-06 Permaglass Method for shaping,tempering and laminating glass sheets
US3837833A (en) * 1971-11-02 1974-09-24 Ppg Industries Inc Heated cover protector for press bending block
US3871857A (en) * 1974-02-19 1975-03-18 Ppg Industries Inc Apparatus for press bending glass sheets
US3960535A (en) * 1974-09-13 1976-06-01 Libbey-Owens-Ford Company Method of and apparatus for bending glass sheets

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4274858A (en) * 1980-01-28 1981-06-23 Ppg Industries, Inc. Molds for press bending glass sheets
US5139552A (en) * 1989-12-05 1992-08-18 Nippon Sheet Glass Co., Ltd. Apparatus for bending and tempering sheet glass
US5122177A (en) * 1990-01-11 1992-06-16 Nippon Sheet Glass Co., Ltd. Method of and system for pressing sheet glass
US5346526A (en) * 1992-01-08 1994-09-13 Libbey-Owens-Ford Co. Apparatus for bending glass sheets
US5755845A (en) * 1994-04-15 1998-05-26 Pilkington Glass Limited Method and apparatus for bending and tempering glass sheets
WO2002068347A2 (en) * 2001-02-27 2002-09-06 Pilkington North America, Inc. Heated ceramic female mold
WO2002068347A3 (en) * 2001-02-27 2003-03-06 Pilkington North America Inc Heated ceramic female mold
US20160279916A1 (en) * 2015-03-24 2016-09-29 Boe Technology Group Co., Ltd. Chip press device and chip press method
CN110252860A (zh) * 2019-07-17 2019-09-20 江苏润松新材料有限公司 一种铝基材复合板圆弧面复合机

Also Published As

Publication number Publication date
SE417599B (sv) 1981-03-30
SE7612672L (sv) 1977-05-14
DE2646845A1 (de) 1977-05-26
DE2646845C3 (de) 1979-01-25
FR2331525B1 (sv) 1978-04-14
CA1081957A (en) 1980-07-22
FR2331525A1 (fr) 1977-06-10
ES453271A1 (es) 1977-11-01
BE848278A (fr) 1977-05-12
JPS5261876A (en) 1977-05-21
JPS6117775B2 (sv) 1986-05-09
DE2646845B2 (de) 1978-06-01
BR7607586A (pt) 1977-09-27
IT1075033B (it) 1985-04-22
GB1523188A (en) 1978-08-31

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